Another defendant struck a deal with prosecutors for his testimony. Baltimore County State's Attorney Scott Shellenberger tells WBAL Radio that the testimony was important in their effort to get a conviction.

"Any time you are trying to explain which seems to be the unexplainable you need someone from the inside unfortunately to make a jury understand how in that gang culture robbing and shooting someone can result in basically a death sentence for that individual. That is their culture and you need somebody from the inside to explain what that motivation is," says Shellenberger.

He adds that video surveillance from the mall and victims as well as cell phone records helped get the conviction.

A third man who police say pulled the trigger is expected to go on trial next year.